Things to be taken care of when OS changes from 2003 to 2008 R2
Currently, I have a number of business streams (applications) sitting on pega 6.1 platform. Sitting on Windows 2003 server (Web (IIS), app and archive). Servers are getting upgraded from 2003 to 2008 R2. Planning to use Mixed federated Node feature of IBM WAS to replicate the configurations details from old servers to new server, inorder to reduce the down time. WAS version will remain the same. No code change. No functional change in any of the applications. Also, user domain and service accounts domain remain the same. Please advise what is the testing scope for this considering unit, System, System Integration and UAT, Performance and volume testing. There are around 35+ upstream applications interationg with Pega applications built on Pega 6.1.
What are the areas to be focused durng testing?
What is the optimum recommended way of tetsing the migration?
I will add some of my thoughts as more people can weigh in.
1. I have checked pega platform guide, windows 2008 is supported for pega 6.1, so no worries there.
2. Make sure your version of WAS is supported by IBM for windows 2008. I assume you have already checked on this.
3. In theory, your applications should just work. Your integration with other systems should not even care about the underlying OS change.
4. Without knowing your normal testing scope, I would run some critical business scenario tests for each application and focus on the performance testing (I assume you already have something setup and you can simply kick off the run once the systems have been upgraded to new OS).
5. Curious, is your database affected by this upgrade? or it is on a separate server?